Two node cluster on 2012r2, vSphere 6, both on the same host, same subnet/virtual switch. The second node constantly goes up and down. Each network card shows as unavailable in the cluster manager. A file share witness is being used and this server is also on the same host. The share is accessible and permissions are full control for the cluster and each node. A packet capture shows that tcp retransmit is occurring but it seems to be after the cluster manager shows the NICS as unavailable. Each node has a heartbeat NIC and it is set to allow cluster network communication only. The current NIC being used is e1000, initially vmxnet3.
The network and node comes back up after about 5 minutes and this repeats constantly.
Any suggestions are appreciated.
